Alloy



a citizen of the Patented Septa 118, i923.

nmrian stars ARNOLD SCHROETTER, OF NEW MANUFACTURING COMPANY, YORK.

YORK, N. Y., ASSIGNOR TO AMERICAN WHITE GOLD INQ, OF NEW YORK, N. Y., A CORPORATION OF NEW ALLOY.

Ito Drawing.

To all whom it may concern:

Be it known that I, ARNOLD Sonnonrrna, United States, residing at 886 East 172nd county ofBronx and State of New York,

have invented certain new and useful Improvements in Alloys, of which the following is a specification.

' y invention relates to platinum substitutes r ing a color like platinum.

An object of my invention is to produce a non-oxidizable non-tarnishable white alloy having approximately the same specific grav- (1 other of the valuable properties of p atinum which can be satisfactorily used in settings, etc., and which can be produced at a moderate cost.

For the purpose of preparing an alloy of this character I employ the following metals: gold, nickel, magnesium, antimony, and zinc.

In preparing one form of my alloy, I

the production of precious alloys havproceed as follows 0 100 parts of a mixture containing 971} nickel and 2% parts of gold I add 7 parts of a mixture of non-precious metals having the following composition:

Magnesium 25% Antimony 12 .7 5% Zinc 65 25% All these five metals are preferably in such a physical condition, that upon the application of heat, they can be readily melted in the order of their respective fusibilities, and so will rapidly fuse and co-mingle and alloy with each other. v

hese five metals are either in the form of powder, granules or such other state of sub-division as will enable them to be readily melted and care is protective slag.

atever proportion of the metals, magnesium, antimony and zinc are oxidized, the

' oxide is naturally dissolved by the borax or other salts which are used to slag off the impurities in the metals.

The heating is continued until a considerable proportion of the magnesium, anti- Street, New York, in the Application filed October 16, 1919. Serial No. 331,098.

Of the alloy obtained by th in described, I take 20% or f Nickel 95.80%, that is ninety-five and eight-tenths per cent, v Gold 2. 48%, that is two and forty-eight hundredths per cent,

Zinc 1. 20%, that is one and two 35 tenths per cent, Magnesium .30%, that is three-tenths of one per cent, Antimony 20%, that is two-tenths of one per cent,

Where it is desired to produce a white metal of greater hardness than the metal produced by the foregoing process, the proportion of the metals magnesium, antlmony and zinc as above specified may be varied somewhat so that in proportion to the 100 parts of nickel and gold the 7 parts represented by magnesium, antlmony and Z1110 may be as follows:

ltftagn'esiummv 37% Antimony 10.75% Zinc 52.25%

but the procedure in the manufacture of the completed white metal is substantially the same as the preceding. a

The finished white gold contains less than 3m approximately only about one-third of one er cent of antimony, zinc and magnesium altogether, the rest of the alloy being substantially gold and nickel. find, however, that the use of magnesium, antimony and zinc in the alloy is of great importance, as the presence of these metals secures a perfect fusion of the nickel and gold in the finished product, and apparently also having an important function in preventing the oxidation of the nickel.

What I claim is:

1. An intermediate alloy for the production of a white metal, said intermediate alloy containing approximately 95% of nickel, 2%% of gold, and suflicient zinc, magnesium and antimony to produce a definite influence on the finished product, the said sum of zinc, magnesium and antimony totalling less than 2%.

.2. An intermediate alloy containing nickel approximately 95%, gold approximately 21}%, zinc 1%, and magnesium and antimony suflicient to produce a definite influence on the finished product, the sum of said magnesium and antimony totalling less than it of 1%.

3. An intermediate alloy containing nickreeaao'z el 94.8%., gold 2%%, zinc 1% and antimony and magnesium together totalling of 1%.

a. An intermediate alloy containing approximately 95% of nickel, 2g% of gold,

zinc over 1%, together with magnesium and antimony, the magnesium or antimony being present in less proportion than the zinc, both the magnesium and antimony being present in suflicient quantity to produce a definite result.

5. An nickel more than 90%, gold more than 2% with the addition of antimony, magnesium and zinc, the antimony, magnesium and zinc totalling less than 2%, the antimony, magnesium and zinc being present in Sllfilcient quantity to produce a definite result upon the product.

6. A white gold comprising nickel more than 80 parts, gold, and a total of less than 1% of the three metals, antimony, zinc and magnesium, in combination, the antimony, magnesium and zinc being present in Suficient quantity to produce a definite result upon the product.

lln testimony whereof ll hereunto afix my signature.

- ARNQLD SCHRUETTER.

intermediate alloy composed of 7 

